Sun-printing frame



(No Model.)

J. S. HAMBAUGH.

- SUN PRINTING FRAME.

ATTORNEYS W. 1/. r .as m w m .1 m fi m f E i U ITED STATES PATENT OFFICE.

JAMES S. HAMIBAUGH, OF JACKSONVILLE, ILLINOIS.

SUN-PRINTING FRAME.

SPECIFICATION forming part of Letters Patent No. 276,173, dated April 24, 1883.

Application filed February 17, 1883. (No model.)

To all whom it may concern:

Be it known that I, JAMES S. HAMBAUGH, of Jacksonville, in the county of Morgan and State of Illinois, have invented certain new and useful Improvements in Sun Printing Frames, (Solargraphs and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification, and in which- Figure 1 is a perspective view, showing the frame open for the insertion or removal ofcopy. Fig. 2 is a cross-section through one side of the frame closed, showing the copy sheet and printing-sheet both in position 5 and Fig. 3 is a plan or face view of the transparent printingsheet.

Similar letters of reference indicate corresponding parts in all the figures.

My invention has relation to sun printing, and is specially adapted to the production of manifold copies, by the so-called blue process, of written matter of any kind. To this end it consists in the improved construction of a printing-frame or solargraph for exposing the printing-sheet and underlying copying-sheet to the action of the sunlight, substantially as hereinafter more fully described and claimed.

In the accompanying drawings, the letter A denotes a frame, made of wood or other suitable material, and preferably of square or rectangular shape. Within this frame is secured a pane, B, of heavy French plate-glass, which must be without air bubbles or flaws of any kind. Another frame, 0, hinged to one side of frame A, has a raised panel, D, covered on its inner side facing the glass with several thicknesses of cotton-battin g or similar material, E, the edges of which are clamped between the raised panel D and its frame 0, as shown at e in Fig. 2. The layers of batting are in turn covered with a piece of soft felt or flannel, F, the edges of which are bound to the edges or shoulders of the panel by a piece of thin braid or tape G and small brads or tacks E. On the opposite end of the glass frame A B is hinged a cover, I, of wood or other suitable material,

and the several parts A, B, G, D, and I may be fastened together by means of suitably-arranged hooks J or other fastenings.

The sensitive copying or manifold sheets on which the written matter is to be reproduced are prepared by the well-known blue process, which, as it forms no part of my invention, does not require description here. These sheets are cut to the proper size to fit the frame, and are used with a printing-sheet of oiled textile fabric, such as oiled silk or transparent oil-cloth. This sheet is shown atK on the drawings, while the sensitized copying-sheet is indicated by the letter L. The matter to be reproduced is drawn or written upon the transparent and pliable sheet of textile material with india ink, not only on account of its blackness, but because changes or erasures in the written matter can readily be made when required by rubbing the printing cloth with a sponge or damp cloth, which leaves the printing-cloth without a mark and ready to be written on again as soon as dry.

I am well aware that it is not new to print from transparent negatives of glass or tracingpaper or tracingcloth but neither of these materials would satisfactorily answer my purpose. Glass cannot be written on with indiaink, neither is it pliable, and writing in indiaink upon ordinary tracing paper or tracingcloth cannot be erased with a wet cloth or sponge without injury to the paper or cloth, the surface of which is not damp-proof.

By the construction of my improved solargraph, as herein described, the copying-sheet and printing-sheet are pressed firmly-together between the padded raised panel D E F and glass pane B, so as to effectually exclude both air and light. This insures a clear, distinct, and every way perfect print; and after the print has been made the lid or cover I may be closed and fastened to exclude light until the frame is needed for another print or impression. A handle, M, is fastened to the middle frame, A, for conveniently carrying the apparatus.

Having thus describedmy invention, I claim and desire to secure by Letters Patent of the United States-- The improved frame or solargraph for solar printingherein shown anddescribed,composed In testimony that I claim the foregoing as of the middle frame, A, having glass pane B, my own I have hereunto affixed my signature 1o hinged. part 0, having raised panel D, providec} in presence of two witnesses.

with the paddingE, clam ped between the pane and frame, and covering F, and hinged lid or JAMES HAMBAUGH' cover I, all constructed and combined substantially as and for the purpose herein shown and. specified.

Witnesses:

B, F. BEEsLEY, A. RUssEL, Jr. 

